Barrier Technologies for Environmental Management Summary of a Workshop (1997) / Chapter Skim
Currently Skimming:
Artifically Frozen Ground as a Subsurface Barrier Technology
Artifically Frozen Ground as a Subsurface Barrier Technology
Pages 171-179
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 171... ...
In many cold regions, it is this liquid fraction that wicks water Tom deeper in the soil profile to the ground's freezing Font, causing Cost heaves -- a serious engineering problem. Liquid-water contents of frozen ground affect the ground's strength, its permeability, and the diffusion rates of solutes in D-153
|
From page 172... ...
FIGURE 2 Calculated relationship between temperature and liquid water in a frozen Royal sandy loam.
|
From page 173... ...
ARTIFICIALLY FROZEN GROUND AS AN ENGINEERING TECHNOLOGY Many, including practicing civil engineers, are unaware of construction ground freezing, yet it is hardy a secret. Perhaps the most famous structure to be affected by construction ground freezing is the tower in Pisa, Italy, the foundation of which is being stabilized by the technique while a more permanent solution to its inclination is being constructed.
|
From page 174... ...
FIGURE4 Calculated relationship between temperature and hydraulic conductivity of a frozen Royal sandy loam.
|
From page 175... ...
Once formed, a frozen-ground barrier effectively eliminates energy loss due to convection and can be maintained indefinitely with Tow power consumption. There is a small, but stable market for construction ground-freezing services; four firms in the United States provide the service.
|
From page 176... ...
Here a frozen-ground bander has been formed to prevent snowmelt-runoff driven horizontal flows of dissolved petroleum products as the active layer above the permafrost thaws. Ground freezing has been proposed, though not as yet adopted, at two DOE reservations: Oak Ridge and Hanford.
|
From page 177... ...
Stance the method typically relies on water in the ground, only that material brought to the surface for drilling holes for freeze pipes may constitute a secondary waste. Once refiigeration is stopped, the ground returns largely to its original condition, although frozen ground may consolidate while thawing.
|
From page 178... ...
Final Report Submitted to Scientific Ecology Group, Inc., Oak Ridge, Tenn. Iskandar, r.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.